1862 Fix checkpoint read permission (#1863)
1862 Fix checkpoint read permission (#1863)

* [DLMED] fix read permission issue

Signed-off-by: Nic Ma <b0dc69321d91891b55520ef34f868910ffd06e02@nvidia.com>
Project-MONAI/MONAI,Project-MONAI/MONAI,Project-MONAI/MONAI,Project-MONAI/MONAI